In case you haven't heard, last year RESNET created a task force to look at ways to improve the consistency of results among certified home energy raters (aka HERS raters). In mid-August, executive director Steve Baden sent an email about the latest developments in the process. He also attached a document titled…Continue
Added by Allison A. Bailes III on October 2, 2014 at 11:34am — No Comments
Home Energy magazine (HEM) has been publishing articles about residential energy efficiency for 30 years. Our articles, editorials, letters, and advertisements provide a kind of window into the evolution of energy conservation technologies, policies, and organizations. Initially, the focus was on audits and simple retrofits, such as weather-stripping and insulation. In those…Continue
We now know that people learn effectively when they construct their own learning, rather than being told about it. The instructor moves off the stage and becomes the Guide on the Side.…Continue
I was first impressed by Rob Nicely when I heard him speak these words to an audience of builders, designers, and building scientists: "We’re the warriors of sustainability...We already know everything we need to know to build sustainable buildings—the question is, Can we internalize it into our culture and incorporate that learning into our practices?"Continue
Added by Tom White on September 24, 2014 at 10:30am — No Comments
The National Association for State Community Services Programs (NASCSP) met in Raleigh, North Carolina, for its annual training conference. Here are some personal highlights:
Added by Jim Gunshinan on September 23, 2014 at 2:03pm — No Comments
Mini-Split Heat Pumps are Quirky and Still Effective
The name "mini-splits" generally refers to heat pump systems with one outdoor unit and one or several smaller capacity air handlers. The efficiency of their operation comes via the inverter compressor and variable refrigerant…Continue
Liz Vogel replaced the windows and updated the heating system in her small multifamily building in the Logan Square neighborhood of Chicago. But she still noticed that parts of her home were not staying warm in winter. So she set out to solve the mystery of the missing heat. She saw icicles hanging from her roof, and that was a clue that pointed to where heat was escaping. The presence of these “ice dams” meant that Liz was paying to heat her roof and melt the snow instead of heating her…Continue
Let the games begin! Please note that registration has opened for the upcoming 2015 Race to Zero Student Design…Continue
Added by Stacy Hunt on September 5, 2014 at 1:49pm — No Comments
We're testing a newly-produced informational video, which our Michigan home inspectors share with their recent home-buying clients, to see how effective it is in driving demand for energy upgrades. Watch it at http://www.nachi.org/michigan-home-inspection-follow-up-survey.htm and share your thoughts.
Note to Homeowners: This article is primarily aimed at the Home Performance industry. I strive for radical transparency, so I put this in the public sphere for you to read as well.
Energy efficiency rebate programs from gas and electric utilities have become pretty common nationwide. They give rebates for replacing your furnace or adding insulation to your home. While these programs seem like a good idea, they can actually…Continue
The September/October 2014 issue of Home Energy marks the magazine’s 30th year in print. To celebrate that milestone, an industry-wide call for nominations found noteworthy professionals in home performance who were 30 years of age or younger. The feature article introduces the young people who the industry can count on to lead the home performance industry for the next 30 years.
Home Energy’s associate editor, Macie Melendez, compiled the nominations and…Continue
When is it ok to put your ducts into an attic, tight up against the Roof Deck? With more conventional building techniques, I would have to argue: NEVER! I do not care how the homeonwer pleads to keep their storage space, you cannot count on delivering cool air to the conditioned space with said branch duct. Even if you did figure out a way to secure the duct to the peak without crushing the inside diameter, the CFM is not the problem. The real issue becomes the dry bulb temperature of…Continue
As I had brought up years ago, ACCA's Manual S was in dire need of an update. Written in 1995, Manual S Residential Equipment Selection was passed by with huge technical and efficiency strides within the…Continue
Zero Energy Home Friends,
My daily PV output from a 6.56 kW PV system has averaged 22.7 kWh/day over the last two years.
irrday= cumulative kWh/m2/day plane of array
pvptmp= array temperature (F) taken on back on one of the modules
Added by Danny S. Parker on August 17, 2014 at 12:55am — No Comments
If you have not been asked to complete a duct test by your local Massachusetts Inspector, it is just a matter of time before you are surprised by this stringent/updated code requirement. Despite some push-back from Contractors and Inspectors, all of MA is required to test new or altered duct systems. All of MA adopted the 2012 International Energy…Continue
Added by Christopher Morin on August 12, 2014 at 1:19pm — No Comments
Hi there, I'm new here. Not sure if this make sense here. But for sure, you will tell if it's not.
I'm Portuguese, I've 47 years old, 3 children, and spent the last 3,5 years of my life on a project I've called Casa Automatica.
The project started by being just an home control system, where I've tried to combined some security features, water control and home network, in a package, using and sharing an internet connection. The system is presented here…Continue
As part of Home Energy’s 30th birthday celebration, we are pleased to reprint a 1994 article by Michael Uniacke describing the way he taught building science in a community college (see the article here). Mastering the intricacies of the building science related to energy performance is no…Continue
Every home is unique and differs from the last. It would be a perfect world (from a project planning standpoint) if every home were a cookie cutter from the previous install, however this is not always the case. I have been in the construction industry doing remodeling and even building new residential homes for over 25 years. Along the way I have run into some interesting situations in which I was not prepared and wished I was. Although this has been sometimes fun and challenging at times,…Continue
Thermostatic Expansion Valves (TEV or TXV), one of the most popular metering devices for residential, high-efficient air conditioning and heat pumps, have performed almost impeccably for decades. Unfortunately, some manufacturers in the past few years have identified batches of valves that have had high superheat issues. Have we just been blind for so long, not realizing these problems existed? Or have these valves really been so reliable for such a long time?
If you think you…Continue